Freestone · Limestone · Pyrénées-Orientales / Fenouillèdes, FR

Boulzane

A stone arch bridge crossing the shallow, rocky Boulzane river lined with dense green vegetation in the Fenouillèdes region of France

The Boulzane flows through the Fenouillèdes basin where Pyrenean stone creates clear water and good trout.

Today · Closed season
Coch-y-bonddu
Forecast · Today
Closed season
Out of season. Try elsewhere.
90% projected
Today's fly
Coch-y-bonddu
Coch-y-bonddu
Conditions on the water · Today
Live gauge
Level
Steady
1.14 m
Water temp17.0°C
ClarityClear
Weather21°C
WindN 10 km/h
Pressure1019 hPa
Rain · recent1.0 mm
Rain · ahead0.9 mm

The nearest gauge doesn't record temperatures, so we've estimated it — defer to the river keeper's advice.

Water temperature for Brown Trout
Warm — slow
17°C est.ideal 10–16°C
0°14°28°
How to fish it · for Brown Trout
When
Nymphing can work through most of the day.
Where
Cover mixed depths.
Method
Start with tight-line nymphs and adjust if fish rise or drift higher.
Kit
9 ft #4 rod, floating line, 12 ft tapered leader to 4–5 lb fluoro tippet.
Likely species
Mayflies
Caddisflies
Gammarids
Hatch timeline · todayPeak at 6pm

12pm(now) — Reed Smut

Stage: On emergersApproach: Emerger or dryActivity: 86%
Also:Flying Ants66%Pale Watery38%Cinnamon Sedge36%
Peak emergence windowWeather boost10 food groups active

Peak activity at 6pm — Evening Sedge (Evening Sedge, Weather boost)

Sub-surface · on the nymphunder the surface

Hatch predictions

Top nymph shown — see all 2 guilds as a supporter.

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Beyond the hatch · worth watchingambient prey(1)

Hatch predictions

Top prey shown — see all 3 as a supporter.

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Evidence
Survey-backed · regionalHigh confidence

Backed by regional invertebrate surveys; no sampling on this exact reach yet.

Through the year
0–3 scale · September highlighted
J
F
M
A
M
J
J
A
S
O
N
D
Trout seasonSeason
1
2
2
2
2
2
1
Alpine RhithrogenaHatch
2
3
3
2
Sculpin / Baitfish (Rivers)Hatch
2
3
3
3
3
3
3
3
2
March BrownHatch
2
3
2
Late March BrownHatch
2
3
2

Numbers are intensity 0 (none) to 3 (peak) — a guide, not a guarantee.

Ranked for today
Brown Trout fly box

More balanced than the mountain-river pack. French nymphing still matters, but there is more room for dries, spiders and general searching flies.

Permits & access
Permit required — see local rules.
  • AAPPMA permits.
What's coming
Plan ahead
5-day outlook
Other water nearby · 5
Aude (upper)
7.0 km
Brown trout · Grayling
Pisciculture du Canigó
29 km
Rainbow trout · Brown trout · Char
Pisciculture de la Fajolle
30 km
Rainbow trout · Brown trout · Char
Bouillouses Mountain Lakes
38 km
Brown trout
Pisciculture de Montferrier
42 km
Rainbow trout · Brown trout · Char
Gallery · 2
  1. A stone arch bridge crossing the shallow, rocky Boulzane river lined with dense green vegetation in the Fenouillèdes region of France
    The Boulzane river at Caudiès-de-Fenouillèdes
  2. Terrain map of the venue
    Terrain map
About this water

The Boulzane flows through the Fenouillèdes basin where Pyrenean stone creates clear water and good trout. AAPPMA-managed with both fly-only and general beats. No-kill stretch available. Wild brown trout respond to seasonal patterns — Baetis in spring, sedges and mayflies through summer. Spate character after rainfall. Check local regulations for parcours requirements.

Hatches & food

No emergence timing has been documented, but DREAL reference-station monitoring at Montfort-sur-Boulzane records a stable, diverse and pollution-sensitive stonefly fauna across five families — a strong indicator of water quality and food base rather than a hatch window.

  • Limestone
Water quality (WFD)
  • Ecology: Good
  • Chemical: Unknown

WFD classification · FRDR10162

The full read · show the working · for Brown Trout · confidence 90%
How the 0 is built — score × weight = contribution
Temperature67 × 28%18.8
Flow80 × 22%17.6
Clarity95 × 18%17.1
Feeding Time60 × 13%7.8
Pressure80 × 7%5.6
Insect activity73 × 12%8.8
Conditions total= 76
Can you trust it?
Water temperatureair-to-water estimateestimated
Level / flowon-river gaugeobserved
Prey activitysurvey-backed invertebrate datasurvey
What would change the calculation
Cooler water — back toward the 10–16 °C ideal band — would lift the score and ease welfare.
The dawn and dusk windows score higher than the midday lull.
Directions
Apple MapsGoogle Maps
Seasons & zones
  • Trout 2nd Saturday of March → 3rd Sunday of September
Related guides
Pyrenees PlaybookFrench riversEuro Nymphingsubsurface methods
Booking & contacts